[dynamodb] Enforce checkstyle for DynamoDB binding (#904)

dynamodb/pom.xml

@@ -16,7 +16,8 @@ permissions and limitations under the License. See accompanying
 LICENSE file.
 -->
 
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
   <modelVersion>4.0.0</modelVersion>
   <parent>
     <groupId>com.yahoo.ycsb</groupId>
@@ -28,50 +29,22 @@ LICENSE file.
   <artifactId>dynamodb-binding</artifactId>
   <name>DynamoDB DB Binding</name>
 
-  <properties>
-    <checkstyle.failOnViolation>false</checkstyle.failOnViolation>
-  </properties>
-
   <dependencies>
     <dependency>
       <groupId>com.amazonaws</groupId>
       <artifactId>aws-java-sdk</artifactId>
       <version>1.10.48</version>
-  </dependency>
-  <dependency>
-     <groupId>log4j</groupId>
-     <artifactId>log4j</artifactId>
-     <version>1.2.17</version>
-  </dependency>
-  <dependency>
+    </dependency>
+    <dependency>
+      <groupId>log4j</groupId>
+      <artifactId>log4j</artifactId>
+      <version>1.2.17</version>
+    </dependency>
+    <dependency>
       <groupId>com.yahoo.ycsb</groupId>
       <artifactId>core</artifactId>
       <version>${project.version}</version>
-    <scope>provided</scope>
+      <scope>provided</scope>
     </dependency>
   </dependencies>
-  <build>
-    <plugins>
-      <plugin>
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-checkstyle-plugin</artifactId>
-        <version>2.15</version>
-        <configuration>
-          <consoleOutput>true</consoleOutput>
-          <configLocation>../checkstyle.xml</configLocation>
-          <failOnViolation>true</failOnViolation>
-          <failsOnError>true</failsOnError>
-        </configuration>
-        <executions>
-          <execution>
-            <id>validate</id>
-            <phase>validate</phase>
-            <goals>
-              <goal>checkstyle</goal>
-            </goals>
-          </execution>
-        </executions>
-      </plugin>
-    </plugins>
-  </build>
 </project>

dynamodb/src/main/java/com/yahoo/ycsb/db/DynamoDBClient.java

@@ -105,7 +105,7 @@ public class DynamoDBClient extends DB {
         this.primaryKeyType = PrimaryKeyType.valueOf(primaryKeyTypeString.trim().toUpperCase());
       } catch (IllegalArgumentException e) {
         throw new DBException("Invalid primary key mode specified: " + primaryKeyTypeString +
-          ". Expecting HASH or HASH_AND_RANGE.");
+            ". Expecting HASH or HASH_AND_RANGE.");
       }
     }
 
@@ -138,7 +138,7 @@ public class DynamoDBClient extends DB {
 
   @Override
   public Status read(String table, String key, Set<String> fields, HashMap<String, ByteIterator> result) {
-    if(LOGGER.isDebugEnabled()) {
+    if (LOGGER.isDebugEnabled()) {
       LOGGER.debug("readkey: " + key + " from table: " + table);
     }
 
@@ -159,7 +159,7 @@ public class DynamoDBClient extends DB {
 
     if (null != res.getItem()) {
       result.putAll(extractResult(res.getItem()));
-      if(LOGGER.isDebugEnabled()) {
+      if (LOGGER.isDebugEnabled()) {
         LOGGER.debug("Result: " + res.toString());
       }
     }
@@ -170,7 +170,7 @@ public class DynamoDBClient extends DB {
   public Status scan(String table, String startkey, int recordcount,
                      Set<String> fields, Vector<HashMap<String, ByteIterator>> result) {
 
-    if(LOGGER.isDebugEnabled()) {
+    if (LOGGER.isDebugEnabled()) {
       LOGGER.debug("scan " + recordcount + " records from key: " + startkey + " on table: " + table);
     }
 
@@ -229,7 +229,7 @@ public class DynamoDBClient extends DB {
 
   @Override
   public Status update(String table, String key, HashMap<String, ByteIterator> values) {
-    if(LOGGER.isDebugEnabled()) {
+    if (LOGGER.isDebugEnabled()) {
       LOGGER.debug("updatekey: " + key + " from table: " + table);
     }
 
@@ -255,7 +255,7 @@ public class DynamoDBClient extends DB {
 
   @Override
   public Status insert(String table, String key, HashMap<String, ByteIterator> values) {
-    if(LOGGER.isDebugEnabled()) {
+    if (LOGGER.isDebugEnabled()) {
       LOGGER.debug("insertkey: " + primaryKeyName + "-" + key + " from table: " + table);
     }
 
@@ -284,7 +284,7 @@ public class DynamoDBClient extends DB {
 
   @Override
   public Status delete(String table, String key) {
-    if(LOGGER.isDebugEnabled()) {
+    if (LOGGER.isDebugEnabled()) {
       LOGGER.debug("deletekey: " + key + " from table: " + table);
     }
 
@@ -318,7 +318,7 @@ public class DynamoDBClient extends DB {
     HashMap<String, ByteIterator> rItems = new HashMap<>(item.size());
 
     for (Entry<String, AttributeValue> attr : item.entrySet()) {
-      if(LOGGER.isDebugEnabled()) {
+      if (LOGGER.isDebugEnabled()) {
         LOGGER.debug(String.format("Result- key: %s, value: %s", attr.getKey(), attr.getValue()));
       }
       rItems.put(attr.getKey(), new StringByteIterator(attr.getValue().getS()));